Fill the calculator form and click on Calculate button to get result here. Quadrilaterals are polygons that have four sides. Enter any 1 variable plus the number of sides or the polygon name. Select the given value form the list. tan = Tan function calculated in degrees. Check out 23 similar 2d geometry calculators , How many sides does a polygon have? For example, a rectangle of 5 by 4 and another rectangle of 6 by 3 has the same perimeter(equal to 18), but the corresponding sides' ratios are different\(\frac{5}{6}\ne\frac{4}{3}\). If you're particularly interested in angles, you may want to take a look at our polygon angle calculator. To guarantee that the n-sided polygons, n > 3, are similar, it is necessary that both conditions in the definition of similar polygons are satisfied. Let dL be the length of the diagonal of the larger polygon, and dS that of the corresponding diagonal of the smaller polygon. I'm a math tutor and I find this app a must have for anyone needing a step by step math application for all types of problems. (Both interior and exterior angles are the same). The equation is simple to solve, and only requires basic math skills. In similar triangles, corresponding angles are equal. Formulas : There are two crucial properties of similar polygons: The above image shows two similar polygons(triangles), ABC, and ABC. for (var i=0; i